import router from './router'
import store from './store'
import { Message } from 'element-ui'
import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'
import Layout from '@/layout'

const _import = require('./router/_import_' + process.env.NODE_ENV) // 获取组件的方法

NProgress.configure({
  showSpinner: false
}) // NProgress Configuration

const whiteList = ['/login'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  const hasToken = getToken()

  if (hasToken) { // cookie中是否有token
    if (to.path === '/login') { // 跳转页面是否为登录页,白名单功能,即不要token认证也能访问的页面
      // 已经登录(存在token),不在跳转到登录页,直接去首页
      next({ path: '/' })
      NProgress.done()
    } else { // 除了白名单(登录页)以外的页面
      const hasGetUserInfo = store.getters.name
      if (hasGetUserInfo) { // 是否存在用户信息
        next()
      } else {
        try {
          // get user info
          await store.dispatch('user/getUserInfoAction') // 获取用户信息
          await store.dispatch('user/getUserRoutesAction') // 获取路由表
          await store.dispatch('user/getUserBtnsAction') // 获取路由表
          if (store.getters.menus.length < 1) {
            global.antRouter = []
            next()
          }

          const menus = routeConverter(store.getters.menus) // 1.过滤路由
          router.addRoutes(menus) // 2.动态添加路由
          global.antRouter = menus // 3.将路由数据传递给全局变量，做侧边栏菜单渲染工作
          next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set And replace
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      // other pages that do not have resource to access are redirected to the login page.
      next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})

// 遍历后台传来的路由字符串，转换为组件对象
// function filterAsyncRouter(asyncRouterMap) {
//   return asyncRouterMap.filter(route => {
//     if (route.component) { // 是否存在 component 属性
//       if (route.component === 'Layout') {
//         route.component = Layout
//       } else {
//         route.component = _import(route.component) // 导入组件
//       }
//     }
//     if (route.children && route.children.length) {
//       route.children = filterAsyncRouter(route.children)
//     }
//     return true
//   })
// }

export function routeConverter(routes) {
  return routes.filter(route => {
    const meta = { title: route.title, icon: route.icon }
    route.meta = route.meta || meta
    delete route.title
    delete route.icon
    route.hidden = route.hidden || route.isHidden
    delete route.isHidden
    route.name = route.path
    if (route.component) {
      // 是否存在 component 属性
      if (route.component.trim().toUpperCase() === 'LAYOUT') {
        route.component = Layout
      } else {
        route.component = _import(route.component) // 导入组件
      }
    }
    if (route.children && route.children.length > 0) {
      route.children = routeConverter(route.children)
    }
    return true
  })
}
